Home / 391,622,140.80-540,448,747.20-215,414,676

Finding the Fourth Proportional to 391,622,140.80, 540,448,747.20 and 215,414,676

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Solution

The fourth proportional to 391,622,140.80, 540,448,747.20 and 215,414,676 is: 297,277,859.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,622,140.80 : 540,448,747.20 = 215,414,676 : x
  2. Step 2: Convert to fraction form
    391,622,140.80/540,448,747.20 = 215,414,676/x
  3. Step 3: Cross multiply
    391,622,140.80x = 540,448,747.20 × 215,414,676
  4. Step 4: Simplify right side
    391,622,140.80x = 116,420,591,772,693,920
  5. Step 5: Solve for x
    x = 116,420,591,772,693,920/391,622,140.80
  6. Step 6: Final answer
    x = 297,277,859.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.